Airdate: Thursday.13.October.2005
The Shed

A woman arrives at a secured lab in Istanbul where scientists in protective
suits experiment with a liquid substance. She shoots a guard and punches a
code to enter the lab. Holding the scientists at gun point, she steals two
vials and breaks a third before locking them in and bolting. They die
instantly.

In the APO office, Marshall shows a video feed of this theft to the team.
The liquid, he says, is called Substance-33, a deadly nerve agent that
kills in seconds. He identifies the woman as a lackey of Gordon Dean, based
on her knowledge of the code and the computer she used to hack it.

Marshall traced the hacker's signal to Prague. Jack gives the case to
Sydney, Marshall and Tom Grace. Sydney privately asks Jack why Dixon isn't
going. Jack says that Dixon is with Sloane, who was allowed to meet a
contact with information about Nadia's cure.

Inside his prison cell, Sloane tells Dixon that he's paying Dolzhenko, the
contact, $300,000 for a lead. Later, in Omsk, Sloane convinces a wary Dixon
to allow him to meet Dolzhenko alone. At the meeting, Dolzhenko points a
gun at Sloane and steals the money.

In Prague, the APO team tracks the hacker to a coffee shop. Armed with a
microprocessor concealed at the back of a mint pack, Syd enters the café,
and speaks to a man with a laptop, assuming he's the hacker. Just then, the
signal fades - the real hacker has left the building. Tom and Marshall give
chase and capture her.

The team interrogates the hacker, whose name is Rachel Gibson, in a hotel
room. Tom catches her transmitting a signal through her watch, and she
admits she's a black ops CIA agent. After she passes a lie detector test,
Syd says she was in the same situation 13 years ago - when she believed she
worked for the country but was actually an enemy.

When Marshall confirms that Rachel's signal went to Gordon Dean, not the
CIA, Rachel cooperates. She agrees to download the encryption key from
Gordon Dean's Vlasska office nearby in order to enable a file transfer from
Marshall's PC.

Rachel, thanks to Syd's remote guidance, successfully downloads the
encryption key. As Rachel walks to the elevator, her friend, Peyton, joins
her. Sensing Rachel's panic, Sydney receives the key in a quick brush pass.
Marshall begins his server download.

Back in Dean's office, Peyton, who has been observing Rachel's change in
behavior, alerts Dean. After spotting the file transfer, Dean and Peyton
leave the building and trigger a bomb.

Marshall discovers that Dean had triggered an EMP that fried all
electronics. Tom rushes out the hotel room to help Rachel. Bombs explode as
Tom makes it to Dean's office. He finds a semi-conscious Rachel beneath the
rubble and cradles her in his arms. Sydney, who arrives shortly after Tom,
meets his gaze silently.